You are wise to quit smoking now although it is too bad it took this to get your attention. I would wait and see what the thallium results are before jumping to conclusions. It could be nothing. Just because you are 35 however does not mean you can't get blockages. Even if the thallium is normal you are at risk for developing problems in the future and therefore still need to modify your lifestyle. So stay away from the cancer sticks, develop healthier eating habits and start an exercise program with your odctors consent.